updated Kotlin to 1.6.10, gradle to 7.3.3, junit to 5.8.2

Kotlin/build.gradle.kts

@@ -1,7 +1,7 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-	kotlin("jvm") version "1.4.0"
+	kotlin("jvm") version "1.6.10"
 }
 
 group = "com.gildedrose"
@@ -13,7 +13,7 @@ repositories {
 
 dependencies {
 	implementation(kotlin("stdlib"))
-	testImplementation("org.junit.jupiter:junit-jupiter:5.6.2")
+	testImplementation("org.junit.jupiter:junit-jupiter:5.8.2")
 }
 
 tasks.test {